Holder for shank-buttons.



M. POTUZAK' HOLDER FORSHANK BUTTONS.

APPLICATION FILED JULY 15. 1916.

1,257,391. Patented Feb. 26,1918,

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UNITED STATES PATEN @FFIQE.

MATHIAS POTUZAK, on NEW YORK, N. Y.

HOLDER FOB. SHANK-BUTTONS.

Application filed July 15, 1916.

To all whom it may concern:

Be it known that I, MArnnis POTUZAK, citizen of the United States, residing at 322 East 75th street, New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Holders for Shank-Buttons, of which the following is a specification.

This invention relates to the art of drilling buttons, especially small pearl buttons having shanks. Prior to my invention, two separate and distinct operations have been found necessary. First, V shaped grooves were formed in both sides of the shank by routing or milling tools, to guide the drill and prevent splitting of the shank during the subsequent drilling operation. Then the button was placed in fixed V shaped jaws and drilled.

The object of my invention is to eliminate entirely the first operation, and to prevent the splitting of the shank during the drilling. Other objects will become apparent as the description proceeds.

Referrin to the drawings, in which what I now consider to be the preferred form of my invention is shown Figure l is a side elevation, partly in section of a work holder constructed according to my invention.

Fig. 2 is a section on line 22, Fig. 1.

Fig. 3 is an enlarged side view of the clamping jaws.

Fig. 4 is a front view of the same.

The work holder is shown as mounted on a base 1 and is shown as of the type which is movable to and from the drill 2, which is stationary. The holder comprises essentially a plurality of relatively movable jaws 3 and 4 adapted to clamp the button 5 therebetween. At least one of the jaws, 4, engages the button shank 6 adjacent and preferably parallel to the hole to be drilled so as to prevent the shank from splitting during the drilling. The other jaw 3 is shown as engaging the face of the button so that it is firmly held in place and prevented from turning away from the drill. Jaw a is preferably provided with an extension 7 forming a guide for the drill, while on jaw 3 is positioned a plate 30 having a recess 33 to fit the button. Said plate is preferably provided with a shank 32 adjustably secured in the work holder by means of set screw 33'.

The movable jaw 4 is mounted on a stem Specification of Letters Patent.

Patented Feb. 26, 1918.

Serial No. 102,422.

having a collar 9 and slidable within a bore 10 formed in the casting 11 supporting jaw 3. Within said bore is a compression spring 12 held between collar 9 and a fixed abutment 13, so that normally the jaws are yieldingly pressed together to clamp the button. A bell crank lever 14, pivoted at 15, is hinged adjacent one end to said stem and is adapted to engage near its other end a stop 16 on support 1. The entire work holder is secured to a shaft 17 slidably but non-rotatably mounted in bearing members 18 and 19 on said support. A compression spring 20 secured between collar 21 on shaft 17 and bearing 19 serves to hold the work holder normally retracted. In this position the jaws will be held open by the engagement of lever 14 with stop 16. A handle 22 is provided to advance the work holder. It is shown as pivoted at 23 to base 1 and is provided with a pin or pins 24 engaged between collars 25, 26 on shaft 17. When it is desired to drill a button, it is merely placed upon jaw 3 in the correct position and handle 22 mounted to advance the shaft 17 This will automatically release lever 14 and allow the jaws to yieldingly but firmly engage the button under the action ofspring 12.

In accordance with the provisions of the patent statutes, I have herein described the principle of operation of my invention, together with the apparatus, which I now consider to represent the best embodiment thereof, but I desire to have it understood that I am entitled to such modifications thereof as fall within the scope of the appended claims.

Having described my invention, what I claim and desire to secure by Letters Patent is 1. In a button drilling machine for shank buttons the combination with a drill, of a work holder comprising a plurality of relatively movable jaws adapted to clamp the button therebetween, at least one of said jaws engaging the shank over a button hole and means for relatively moving said drill and holder toward and away from each other.

2. In a button drilling machine for shank buttons the combination with a drill, awork holder comprisin a plurality of relatively movable jaws adapted to clamp the button therebetween, at least one of said jaws engaging the shank over a button hole, means for n'ioving the work holder to and from the drill and means for automatically operating said jaws by such movement.

3. In a button drilling machine for shank buttons, a work holder comprising a plurality of relatively movable jaws adapted to clamp the button therebetween, at least one of said jaws engaging the shank over a but ton hole, yielding means for holding the jaws closed, and means responsive to withdrawal of the work holder for opening said jaws.

4. In a button drilling machine for shank buttons, a work holder comprising a plurality of relatively movable jaws adapted to clamp the button therebetween, at least one of said jaws engaging the shank over a button hole; yielding means for holding the movable jaw normally closed; a bell crank lever pivoted to said jaw adjacent one end, and a stop on a fixed portion of the holder adapted to engage sald lever adjacent its other end, whereby on Withdrawal of the work holder said jaw automatically opens to release the button.

5. In a button drilling machine for shank buttons, the combination with a drill, of a work holder comprising a plurality of relatively movable jaws adapted to clamp the button therebetween, at least one of said jaw-s engaging the shank over a button hole,

means for relatively moving the Work holder and drill toward and away from each other and means for automatically operating said jaws by such movement.

In testimony whereof I have atliXed my signature.

MATHIAS POTUZAK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

